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CN103867749B - A kind of flow passage selector device - Google Patents

A kind of flow passage selector device Download PDF

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Publication number
CN103867749B
CN103867749B CN201210595365.4A CN201210595365A CN103867749B CN 103867749 B CN103867749 B CN 103867749B CN 201210595365 A CN201210595365 A CN 201210595365A CN 103867749 B CN103867749 B CN 103867749B
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CN
China
Prior art keywords
valve
valve seat
valve body
cavity
flow passage
Prior art date
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Active
Application number
CN201210595365.4A
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Chinese (zh)
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CN103867749A (en
Inventor
不公告发明人
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Sanhua Intelligent Controls Co Ltd
Original Assignee
HANGZHOU TONGCHAN MACHINERY Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by HANGZHOU TONGCHAN MACHINERY Co Ltd filed Critical HANGZHOU TONGCHAN MACHINERY Co Ltd
Priority to CN201210595365.4A priority Critical patent/CN103867749B/en
Publication of CN103867749A publication Critical patent/CN103867749A/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/06Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
    • F16K11/072Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with pivoted closure members
    • F16K11/074Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with pivoted closure members with flat sealing faces
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00Construction of housing; Use of materials therefor
    • F16K27/04Construction of housing; Use of materials therefor of sliding valves
    • F16K27/044Construction of housing; Use of materials therefor of sliding valves slide valves with flat obturating members
    • F16K27/045Construction of housing; Use of materials therefor of sliding valves slide valves with flat obturating members with pivotal obturating members
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00Construction of housing; Use of materials therefor
    • F16K27/10Welded housings
    • F16K27/105Welded housings for gate valves

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Multiple-Way Valves (AREA)
  • Valve Housings (AREA)

Abstract

The invention belongs to stream control technology field, it is related to a kind of flow passage selector device, it includes cover body, valve body, the cavity being made up of the cover body and valve body airtight connection, the rotor part being placed in cavity, valve element and the coil component being placed in outside cavity, the entrance sleeve connected by intake channel with cavity, flow passage selector device also includes the valve seat with valve body fixed setting, valve body is stainless steel materials punch forming, three discharge connections are fixedly installed with valve seat, entrance sleeve is fixedly installed with valve body, entrance sleeve, three discharge connections, valve seat is fixed by welding with valve body, the flow passage selector device that the present invention provides, pass through the optimization of structure, make the welding position of valve seat with the welding position of valve body and cover body at intervals, can so argon arc welding be used to connect, technics comparing is simple.Set the valve seat interior surface of valve port to be easily worked, and advantageously ensure that the cooperation with valve element, so as to ensure the accurate switching of outlet.

Description

A kind of flow passage selector device
Technical field
The present invention relates to stream control technology field, and in particular to a kind of flow passage selector device of refrigeration system.
Background technology
In refrigerator refrigerating cycle apparatus, generally use dynamoelectric switching valve is as the control unit for changing refrigerant flowpath Part.
Fig. 9 and Figure 10 are refer to, Fig. 9 is a kind of typical dynamoelectric switching valve structural representation;Figure 10 is electricity shown in Figure 10 The structural representation of valve seat in dynamic switching valve.
Dynamoelectric switching valve generally includes outer cover 11 ' and the valve seat 110 ' being welded and fixed with outer cover 11 ', valve seat 110 ' with it is outer Cover 11 ' forms valve pocket, and axle sleeve 12 ', axle 13 ', magnetic rotor component 14 ', spring 15 ', pad 16 ', sliding block are set inside valve pocket 17 ', the part such as bump rubber 18 ', latch 19 ', the outside of valve seat 110 ' are also inserted with resilient key 113 ', and the bottom of valve seat 110 ' connects Exit adapter 112 ' and entrance sleeve 111 ', entrance sleeve 111 ' and discharge connection 112 ' are usually red copper material.
The valve seat 110 ' of dynamoelectric switching valve is in integral structure in the prior art, is directly process by bar, is such as schemed Shown in 10, the inside of integral type valve seat 110 ' processes the channel design being connected with miscellaneous part.In order to ensure the sealing of valve body Property, the mode that welding is usually taken with outer cover 11 ' for valve seat 110 ' is fixed, as shown in figure 9, generally cylindrical valve seat 110 ' has There is the flange radially extended, form step surface 1101 ', the end face of the opening portion of outer cover 11 ' is welded with the step surface 1101 ' of valve seat 110 ' It is connected together, then valve seat 110 ' forms the valve pocket of sealing with outer cover 11 '.Assembled on valve seat 110 ' required parts and then Outer cover 11 ' and valve seat 110 ' are welded, welds and easily produces high temperature, in order to ensure the function of valve inner part not by high temperature shadow Ring, it is more strict for welding process requirement.Generally use laser welding process stationary housings 11 ' and valve seat 110 ', Laser Welding It is connected on energy in welding process to concentrate, heat affected area metallographic excursion is small, then can drop influence of the high temperature to inner body It is extremely minimum, and deformation of the laser welding caused by heat transfer is relatively low, does not interfere with the overall appearance of dynamoelectric switching valve, but It is to ensure the welding quality in laser welding process lower valve body, that is, ensures the sealing of valve pocket, prevent leakage, and valve body Bulk strength, valve seat 110 ' and outer cover 11 ' be required to be process using easily welding and the material with higher-strength, such as easily The stainless steel material of welding.
But in existing structure, valve seat 110 ' is changed to after stainless steel, it is necessary to by Cutting Process machine-shaping, but High strength easy welding material often not Cutting free, therefore, using the valve seat 110 ' of the structure and material to process equipment, cutter The requirement of tool is higher, while valve seat uses overall structure, and processing technology cost is higher, and production efficiency is relatively low.
Therefore, the structure and its processing mode of dynamoelectric switching valve how are improved, on the premise of welding quality is ensured, is reduced Cost of goods manufactured and simplified technique, are those skilled in the art's technical issues that need to address.
The content of the invention
Therefore, the present invention proposes a kind of improved flow passage selector device structure, it includes cover body, valve body, by the cover body The cavity formed with valve body airtight connection, the rotor part, valve element and the coil being placed in outside the cavity that are placed in the cavity Part, the entrance sleeve connected by intake channel with the cavity, the flow passage selector device also include consolidating with the valve body Surely the valve seat set, the valve body are stainless steel materials punch forming, and three discharge connections are fixedly installed with the valve seat, described Entrance sleeve is fixedly installed with the valve body, and the entrance sleeve, three discharge connections, valve seat are consolidated by welding with the valve body It is fixed;Valve seat is provided with three valve ports towards the surface in cavity, and valve port connects with the discharge connection, the valve element and valve seat phase To setting;
Such as the flow passage selector device of above-mentioned structure, it is preferable that the valve seat is the substantially column structure for being provided with stage portion, The valve seat in the stage portion by being weldingly fixed on the valve body;
Specifically, the valve seat is included towards the prismoid section of one end formation in cavity and cylinder portion outwardly, prismoid section The stage portion is formed between cylinder portion, prismoid section less frustum face one end exports towards inside cavity, described three Passage penetrates the frustum face of the prismoid section, the frustum face cooperatively forms cutting for three exit passageways with the valve element Portion is changed, the flow passage selector device drives the frustum face of the valve element opposite valve seat to rotate described in change by the rotor part The position of valve element, to change three exit passageways and the conducting situation in the cavity;Preferably, the aperture of the valve port is less than The aperture of the exit passageway communicated therewith exit passageway at discharge connection, and the axis of the valve port is to the axle of the valve seat The distance of the heart is less than axis of the exit passageway communicated therewith at discharge connection to the distance in the axle center of the valve seat;
Preferably, the stage portion coordinated with the entrance sleeve, the entrance sleeve insertion are additionally provided with the valve body Entered stage portion simultaneously protrudes from inner surface of the valve body towards cavity;
Preferably, the valve seat is higher by the outer face of the valve body backwards to the outer face of cavity, and with the valve body The height of stage portion is roughly the same;
Preferably, the boss coordinated with the stage portion of the valve seat, the height of the boss are additionally provided with the valve body It is higher by the height of the stage portion;
Further, the positioning element of sheet fabrication shaping, the positioning are further fixedly arranged between the cover body and valve body Positioning is realized by salient point or shrinkage pool between part and the valve body;The resistance of bending and molding is provided with the positioning element Stopper, to be used as the positioning rotated to rotor part;
Further, it is further fixed on limiting the locating shaft at the center of the rotor part on the valve seat, the locating shaft leads to Cross the axle center that interference fit is fixed on the valve seat;
Further, the entrance sleeve, three discharge connections, valve seat are fixed by disposably welding with the valve body, institute Cover body is stated to be welded and fixed by argon arc welding or laser welding mode with the valve body.It thus is avoided that hot shadow caused by secondary welding Ring, improve the reliability of product.
The flow passage selector device that the present invention provides, by sheet fabrication stainless steel body and cover body, by three exit passageways It is arranged on valve seat, intake channel is arranged on valve body.It is close due to being welded to connect position, during processing, first import can be connect Pipe, discharge connection and valve seat form component using welding, while by the optimization of structure, make the welding position of valve seat and valve body and The welding position of cover body at intervals, so can use argon arc welding or laser welding to connect, technics comparing is simple.If The valve seat interior surface for putting valve port is easily worked, and advantageously ensures that the cooperation with valve element, so as to ensure the accurate switching of outlet.
Brief description of the drawings
Fig. 1:The structural representation for the flow passage selector device that the present invention provides;
Fig. 2:The sectional view of flow passage selector device main part in Fig. 1;
Fig. 3/4:The front view and top view of the valve component of flow passage selector device in Fig. 1;
Fig. 5:The position view of valve component welding step in Fig. 3;
Fig. 6:Another valve component structure chart for the flow passage selector device that the present invention provides;
Fig. 7:The third valve component structure chart for the flow passage selector device that the present invention provides;
Fig. 8:The position view of valve component welding step in Fig. 3;
Fig. 9::The dynamoelectric switching valve structural representation of prior art;
Figure 10:The structural representation of valve seat in dynamoelectric switching valve in Fig. 9.
Symbol description in figure:
1/1A- valve bodies;
12- outer faces, 13- stage portions;
14- boss, 15- mounting holes;
2/2A- valve seats, 21- stage portions;
22- frustums face, 23- outer faces;
24- locating shafts, 3/3A- entrance sleeves;
31- intake channels, 32- stage portions;
4A/4B/4C- discharge connections;
41A/41B/41C- exit passageways;
42A/42B/42C- valve ports;
5- valve elements, 6- cover bodies;
61- positioning elements, 62- stop parts;
7- rotor parts, 8- coil components;
9- cavitys;
100- valve components, 200- tooling platforms.
Embodiment
Technology of the invention is given below in conjunction with the accompanying drawings and illustrated.
Fig. 1 is the structural representation for the flow passage selector device that the present invention provides, and Fig. 2 is the flow passage selector device main part Sectional view.Fig. 3/4 are the front view and top view of the valve component of the flow passage selector device.
As shown in Figure 1, Figure 2, shown in Fig. 3 and Fig. 4.Flow passage selector device includes the cover of the semiclosed tubbiness of stainless steel material shaping Body 6 and the valve body of stainless steel materials machine-shaping 1, the substantially end cap shape of valve body 1.Cover body 6 is consolidated with valve body 1 by welding manner Fixed connection forms a relatively closed cavity 9, and specific welding manner can pass through argon arc welding or laser welding.In the outer of cover body 6 Side is fixed with coil component 8, and rotor part 7 is provided with cavity 9.Positioning element is further fixed between cover body 6 and valve body 1 61, coordinated between positioning element 61 and the cover body 6 by salient point and shrinkage pool and realize positioning, be additionally provided with positioning element 61 logical The stop part 62 of bending and molding is crossed, it acts on the turned position for being backstop and limitation rotor part 7.In addition, positioning element 61 Can be by setting shrinkage pool, salient point to carry out cooperation positioning on positioning element 61, the valve body 1.
Valve component 100 includes valve body 1 and the valve seat 2 that is welded on valve body 1, offers three connecting holes on valve seat 2, and three Individual discharge connection 4A/4B/4C by these connecting holes by being welded on valve seat 2 respectively, and discharge connection 4A/4B/4C is by going out Mouth passage 41A/41B/41C connects with the inside of cavity 9;Stage portion 13 is further opened with valve body 1, entrance sleeve 3 is inserted into this It is welded and fixed in the hole of stage portion 13, entrance sleeve 3 is connected by intake channel 31 with the inside of cavity 9.The insertion of entrance sleeve 3 Depth can make entrance sleeve concordant with the inner surface of valve body 1 towards cavity, can also protrude from valve body 1 in addition towards cavity Inner surface, so advantageously in welding.
Valve seat 2 is substantially column structure, stage portion 21 is provided with the middle part of cylinder, valve body is provided with mounting hole 15, valve Seat 2 is connected on the mounting hole 15 of valve body 1 by the stage portion 21 from the side of cavity to be implemented to be welded and fixed.In the direction of valve seat Side outside cavity 9, three larger circular holes of relative aperture (setting a diameter of Φ 1) are machined with, three round centers of circle are with valve Seat 2 axle center for the center of circle same circle on, if this is R1 with radius of circle, three manholes respectively with exit passageway 41A/41B/ 41C is connected;Equally, three less circular holes of relative aperture are machined with and (are set a diameter of towards the side in cavity 9 in valve seat Φ 2), three round centers of circle are also on the same circle using the axle center of valve seat 2 as the center of circle, if this is R2 with radius of circle, three circles One end is connected with exit passageway 41A/41B/41C, and the end of the other end to valve seat 2 extends to form valve port 42A/42B/42C, valve seat 2 form prismoid section towards one end in cavity, and the frustum face 22 of valve port 42A/42B/42C insertion prismoid sections connects with cavity.
As preferable mode, in the present embodiment, Φ 2 < Φ 1, R2 < R1 are set, can so be subtracted to greatest extent The design size of few valve seat and valve element, and valve seat 2 sets the structure in frustum face to be easy for carrying out grinding Precision Machining to end face, protects Demonstrate,prove the seal that valve element coordinates with valve seat;Frustum is less than close or fitting valve body bottom surface end face facing to the end face of cavity, this Sample, be advantageous to the positioning of valve seat and valve body.And, it is preferable that a diameter of R1 same circle and a diameter of R2 same circle are concentric circles.
In the present embodiment, the axle center of valve seat 2 is also provided with locating shaft 24, valve element 5 and rotor by interference fit Part 7 slidably inserts locating shaft 24, and carries out pivot positioning with locating shaft 24, i.e. locating shaft 24 passes through the He of valve element 5 Rotor part 7.The upper end of rotor part 7 is rotatably supported in cavity 9 by elastomeric element, and rotor part 7 is with movable valve plug 5 The frustum face 22 of opposite valve seat 2 rotates the handover operation realized to three exit passageway 41A, 41B, 41C conductings.
Fig. 5 is the position view of valve component welding operation.As shown in Figure 5.When valve component 100 is implemented to assemble, First pass through interference method valve seat 2 is fixed on valve body 1, specifically or by interference method or using frock fix;Again by valve body 1 It is fixed on tooling platform 200, then successively inserts three discharge connections 4A, 4B, 4C in the connecting hole of valve seat, by entrance sleeve 3 are inserted into the stepped hole of valve body, and carry out pre-determined bit by frock clamp.During welding, the Q positions on valve component 100 Disposable addition solder and the method heated implement welding and form valve component 100.As preferred structure, for ease of adding for solder Add, the outer face 12 of valve seat 2 and the height of the stage portion 13 on valve body 1 are roughly equal (i.e. as illustrated, H1 ≈ H2).And weld Welding manner in stove can be used disposably to weld completion, so as to reduce the welding damage to parts such as valve bodies.
Fig. 6 is another valve component structure chart for the flow passage selector device that the present invention provides.As shown in fig. 6, with it is foregoing Unlike scheme, in this embodiment, entrance sleeve 3A front end is arranged to stage portion 32, is so easy to before erection welding The stage portion 13 of entrance sleeve 3A and valve body coordinates positioning.
Fig. 7 is the third valve component structure chart for the flow passage selector device that the present invention provides, and Fig. 8 is the valve body of the structure The position view of components welding step.
As shown in Figure 7 and Figure 8.Unlike aforementioned schemes, in this embodiment, stage portion is provided with valve seat 2A 21, valve body 1A are provided with the boss 14 with mounting hole 15, and valve seat 2A is connected to valve by side of the stage portion 21 outside cavity Implement to be welded and fixed on body 1A boss 14.As preferable structure, boss 14 will be higher by the height of stage portion 13.So as schemed Shown in 8, it is easy to solder to irrigate the place that is welded to connect with valve body 1A and valve seat 2A first when implementing disposable welding, improves welding Reliability.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should It is considered as protection scope of the present invention.

Claims (10)

1. a kind of flow passage selector device, including cover body, valve body, the cavity being made up of the cover body and valve body airtight connection, it is placed in Rotor part, valve element in the cavity and the coil component being placed in outside the cavity, connected by intake channel and the cavity Logical entrance sleeve, it is characterised in that the flow passage selector device also includes the valve seat with valve body fixed setting, the valve Seat sets frustum face, and the frustum is less than the end face of close or the fitting valve body bottom surface facing to the end face of the cavity, The valve body is stainless steel materials punch forming, and three discharge connections are fixedly installed with the valve seat, the entrance sleeve and institute Valve body fixed setting is stated, the entrance sleeve, three discharge connections, valve seat are fixed by welding with the valve body;Valve seat direction Surface in cavity is provided with three valve ports, and valve port is connected with the discharge connection, and the valve element is oppositely arranged with valve seat.
2. flow passage selector device as claimed in claim 1, it is characterised in that the valve seat is the big scapus for being provided with stage portion Body structure, the valve seat in the stage portion by being weldingly fixed on the valve body.
3. flow passage selector device as claimed in claim 2, it is characterised in that the valve seat includes being formed towards one end in cavity Prismoid section and towards the cylinder portion outside cavity, stage portion, the cone are formed between the prismoid section and the cylinder portion The less one end in platform portion penetrates the frustum face of the prismoid section, the frustum face towards inside cavity, three exit passageways The switching part of three exit passageways is cooperatively formed with the valve element, the flow passage selector device passes through the rotor part band The frustum face for moving the valve element opposite valve seat rotates the position for changing the valve element, to change three exit passageways and the cavity Interior conducting situation.
4. flow passage selector device as claimed in claim 3, it is characterised in that the aperture of the valve port goes out less than what is communicated therewith The aperture of mouth passage exit passageway at discharge connection, and the axis of the valve port is less than to the distance in the axle center of the valve seat Distance of axis of the exit passageway communicated therewith at discharge connection to the axle center of the valve seat.
5. flow passage selector device as claimed in claim 3, it is characterised in that be additionally provided with the valve body and connect with the import The stage portion that pipe coordinates, the entrance sleeve enter stage portion and protrude from inner surface of the valve body towards cavity.
6. flow passage selector device as claimed in claim 5, it is characterised in that the valve seat is higher by institute backwards to the outer face of cavity The outer face of valve body is stated, and it is roughly the same with the height of the stage portion on the valve body.
7. flow passage selector device as claimed in claim 5, it is characterised in that be additionally provided with the valve body and the valve seat The boss that stage portion coordinates, the height of the boss are higher by the height of the stage portion.
8. the flow passage selector device as described in claim any one of 1-7, it is characterised in that also solid between the cover body and valve body Surely the positioning element of sheet fabrication shaping is provided with, is realized and determined by salient point or shrinkage pool between the positioning element and the valve body Position;The stop part of bending and molding is provided with the positioning element, to be used as the positioning rotated to rotor part.
9. the flow passage selector device as described in claim any one of 1-7, it is characterised in that be further fixed on limiting on the valve seat The locating shaft at the center of the rotor part, the locating shaft are fixed on the axle center of the valve seat by interference fit.
10. the flow passage selector device as described in claim any one of 1-7, it is characterised in that the entrance sleeve, three outlets Adapter, valve seat are welded and fixed by disposably welding with the valve body, and the cover body passes through argon arc welding or laser with the valve body Welding manner is welded and fixed.
CN201210595365.4A 2012-12-12 2012-12-12 A kind of flow passage selector device Active CN103867749B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210595365.4A CN103867749B (en) 2012-12-12 2012-12-12 A kind of flow passage selector device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210595365.4A CN103867749B (en) 2012-12-12 2012-12-12 A kind of flow passage selector device

Publications (2)

Publication Number Publication Date
CN103867749A CN103867749A (en) 2014-06-18
CN103867749B true CN103867749B (en) 2018-04-10

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108571604B (en) * 2017-03-10 2020-05-22 浙江三花制冷集团有限公司 One-way control valve and manufacturing method thereof
CN112443678A (en) * 2019-08-29 2021-03-05 浙江三花汽车零部件有限公司 Flow path switching device
CN114382917A (en) * 2020-10-21 2022-04-22 浙江三花智能控制股份有限公司 Valve device

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002081559A (en) * 2000-06-19 2002-03-22 Fuji Koki Corp Motor-operated change-over valve
JP4183075B2 (en) * 2002-09-12 2008-11-19 日本電産サンキョー株式会社 Valve device
JP4565946B2 (en) * 2004-09-22 2010-10-20 日本電産サンキョー株式会社 Valve drive device
CN202023973U (en) * 2011-03-29 2011-11-02 浙江三花制冷集团有限公司 Refrigerator refrigeration cycle device and electric change-over valve thereof
CN202065504U (en) * 2011-05-19 2011-12-07 浙江三花制冷集团有限公司 Electric switch valve and refrigerator using same
CN202091557U (en) * 2011-05-19 2011-12-28 浙江三花制冷集团有限公司 Electric switching valve and refrigerator using same
CN202884175U (en) * 2012-10-11 2013-04-17 浙江盾安禾田金属有限公司 Main valve structure of improved stainless steel four-way reversing valve

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Effective date of registration: 20180619

Address after: 312500 Xinchang County, Zhejiang Province, Qixing street, Liquan

Patentee after: Zhejiang three flower intelligent control Limited by Share Ltd

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Patentee before: HANGZHOU TONGCHAN MACHINERY CO., LTD.

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